Caro-Kann Defense: Main Line: what should Black play?

In this position from the Caro-Kann Defense: Main Line, Black faces an advanced g5 eyeing key light squares in the camp. The engine ranks the central strike c5 as the strongest option with an evaluation of -0.27, aiming to challenge White's center immediately, while the popular retreat-forcing h6 remains Black's most frequent practical choice.

The Immediate Counter-Strike with c5

Although c5 appears in only 3.4% of games (31K recorded), it provides Black with dynamic counterplay against the central pawn on d4. White scores 47.2% against this move, representing the lowest scoring rate among Black's top options. An illustrative engine continuation runs c5 Bc4 e6 Ne2 a6 a4, where Black blunts the bishop's diagonal and prepares queenside expansion while White redistributes pieces toward the center.

The Popular Repertoire: h6 and Bf5

The vast majority of games diverge into more standard Caro-Kann setups. The direct push h6 accounts for 56.2% of games (513K recorded) with an evaluation of -0.14, meeting the illustrative sequence h6 N5f3 Nbd7 Bd3 Qc7 Ne2, where White scores 57.1%. Developing the light-squared bishop outside the pawn chain via Bf5 represents the second most frequent path, played in 22.7% of games (207K recorded, evaluated at -0.06), leading into Bf5 Ne2 h6 Nf3 Bh7 Ng3 with White scoring 53.1%.

Minor Continuations: e6 and Bg4

Black also develops via e6 in 11.9% of games (109K recorded, -0.08 eval), which allows the illustrative line e6 Bd3 h6 Ne4 Qxd4 Nf3 and yields White 57.2%. Alternatively, Bg4 is chosen in 5.8% of games (53K recorded, -0.12 eval), where play can proceed Bg4 Be2 Bf5 Bd3 Bxd3 Qxd3, resulting in a 54.2% score for White.